Automatic ankle brachial pressure index system

摘要

An ABPI measurement system includes a cuff for each ankle and a cuff for each arm of a patient. Each cuff has first and second chambers. The four cuffs are applied to each limb (or finger or toe), each chamber is inflated simultaneously to a pressure until a Pneumo Arterial Plethysmography (PAPG) signal related to the arterial flow in the limb is detected at the chambers. The second chambers are then simultaneously inflated until the PAPG signals are extinguished in each limb, the inflation of the second chambers continuing for 10 mmHg to 20 mmHg above the extinguishing pressure. The second chambers are then deflated and the pressure in the second chamber at which the PAPG signal returns in the first chamber is recorded for each limb and this value of the pressure is used to calculate the ABPI. The ABPI is displayed or sent to a remote site.

主权项

1. An ABPI and/or TBPI measuring device including:
a. at least two inflatable cuffs, wherein:
(1) at least one of the cuffs is to be wrapped around an upper limb,(2) at least one of the cuffs is to be wrapped around a lower limb,(3) each of the cuffs has an inflatable proximal limb chamber and an inflatable distal limb chamber spaced therefrom; b. a pressure sensor providing measurements of the pressures in the proximal and distal limb chambers; c. a fluid source connected to the chambers of the cuffs, wherein the device includes a control configured to activate the fluid source to: (1) simultaneously inflate the distal limb chambers; (2) while the distal limb chambers are inflated, simultaneously inflate the proximal limb chambers; (3) subsequently deflate the proximal limb chambers; and (4) subsequently deflate the distal limb chambers.